Allow to set initial RTS and DTR state after connect

serial_windows.go

@@ -451,9 +451,13 @@ func nativeOpen(portName string, mode *Mode) (*windowsPort, error) {
 		return nil, &PortError{code: InvalidSerialPort}
 	}
 	params.Flags &= dcbRTSControlDisbaleMask
-	params.Flags |= dcbRTSControlEnable
+	if mode.InitialRTS {
+		params.Flags |= dcbRTSControlEnable
+	}
 	params.Flags &= dcbDTRControlDisableMask
-	params.Flags |= dcbDTRControlEnable
+	if mode.InitialDTR {
+		params.Flags |= dcbDTRControlEnable
+	}
 	params.Flags &^= dcbOutXCTSFlow
 	params.Flags &^= dcbOutXDSRFlow
 	params.Flags &^= dcbDSRSensitivity